Initial commit, basic mongoid3?, 4? and 5? questions.

.gitignore

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+Gemfile.lock
+pkg

.rspec

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+--format documentation
+--color

.rubocop.yml

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+AllCops:
+  Exclude:
+    - vendor/**/*
+
+inherit_from: .rubocop_todo.yml

.rubocop_todo.yml

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+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2015-09-17 09:24:51 -0400 using RuboCop version 0.33.0.
+# The point is for the user to remove these configuration records
+# one by one as the offenses are removed from the code base.
+# Note that changes in the inspected code, or installation of new
+# versions of RuboCop, may require this file to be generated again.
+
+# Offense count: 3
+# Configuration parameters: AllowURI, URISchemes.
+Metrics/LineLength:
+  Max: 95
+
+# Offense count: 2
+Style/Documentation:
+  Exclude:
+    - 'lib/mongoid-compatibility/self.rb'
+    - 'lib/mongoid-compatibility/version.rb'
+
+# Offense count: 1
+# Configuration parameters: Exclude.
+Style/FileName:
+  Exclude:
+    - 'lib/mongoid-compatibility.rb'

.travis.yml

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+rvm:
+  - 2.2
+  - 2.1.1
+  - 2.0.0
+  - 1.9.3
+  - rbx-2.2.10
+  - jruby-19mode
+
+services:
+  - mongodb
+
+env:
+  - MONGOID_VERSION=3
+  - MONGOID_VERSION=4
+  - MONGOID_VERSION=5
+

CHANGELOG.md

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+### 0.1.0 (Next)
+
+* Initial public release - [@dblock](https://github.com/dblock).

CONTRIBUTING.md

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+Contributing to Mongoid::Compatibility
+=======================================
+
+Mongoid::Compatibility is work of [many of contributors](https://github.com/dblock/mongoid-compatibility/graphs/contributors). You're encouraged to submit [pull requests](https://github.com/dblock/mongoid-compatibility/pulls), [propose features, ask questions and discuss issues](https://github.com/dblock/mongoid-compatibility/issues).
+
+#### Fork the Project
+
+Fork the [project on Github](https://github.com/dblock/mongoid-compatibility) and check out your copy.
+
+```
+git clone https://github.com/contributor/mongoid-compatibility.git
+cd mongoid-compatibility
+git remote add upstream https://github.com/dblock/mongoid-compatibility.git
+```
+
+#### Create a Topic Branch
+
+Make sure your fork is up-to-date and create a topic branch for your feature or bug fix.
+
+```
+git checkout master
+git pull upstream master
+git checkout -b my-feature-branch
+```
+
+#### Bundle Install and Test
+
+Ensure that you can build the project and run tests.
+
+```
+bundle install
+bundle exec rake
+```
+
+#### Write Tests
+
+Try to write a test that reproduces the problem you're trying to fix or describes a feature that you want to build. Add to [spec/mongoid-compatibility](spec/mongoid-compatibility).
+
+We definitely appreciate pull requests that highlight or reproduce a problem, even without a fix.
+
+#### Write Code
+
+Implement your feature or bug fix.
+
+Ruby style is enforced with [Rubocop](https://github.com/bbatsov/rubocop), run `bundle exec rubocop` and fix any style issues highlighted.
+
+Make sure that `bundle exec rake` completes without errors.
+
+#### Write Documentation
+
+Document any external behavior in the [README](README.md).
+
+#### Update Changelog
+
+Add a line to [CHANGELOG](CHANGELOG.md) under *Next Release*. Make it look like every other line, including your name and link to your Github account.
+
+#### Commit Changes
+
+Make sure git knows your name and email address:
+
+```
+git config --global user.name "Your Name"
+git config --global user.email "contributor@example.com"
+```
+
+Writing good commit logs is important. A commit log should describe what changed and why.
+
+```
+git add ...
+git commit
+```
+
+#### Push
+
+```
+git push origin my-feature-branch
+```
+
+#### Make a Pull Request
+
+Go to https://github.com/contributor/mongoid-compatibility and select your feature branch. Click the 'Pull Request' button and fill out the form. Pull requests are usually reviewed within a few days.
+
+#### Rebase
+
+If you've been working on a change for a while, rebase with upstream/master.
+
+```
+git fetch upstream
+git rebase upstream/master
+git push origin my-feature-branch -f
+```
+
+#### Update CHANGELOG Again
+
+Update the [CHANGELOG](CHANGELOG.md) with the pull request number. A typical entry looks as follows.
+
+```
+* [#123](https://github.com/dblock/mongoid-compatibility/pull/123): Reticulated splines - [@contributor](https://github.com/contributor).
+```
+
+Amend your previous commit and force push the changes.
+
+```
+git commit --amend
+git push origin my-feature-branch -f
+```
+
+#### Check on Your Pull Request
+
+Go back to your pull request after a few minutes and see whether it passed muster with Travis-CI. Everything should look green, otherwise fix issues and amend your commit as described above.
+
+#### Be Patient
+
+It's likely that your change will not be merged and that the nitpicky maintainers will ask you to do more, or fix seemingly benign problems. Hang on there!
+
+#### Thank You
+
+Please do know that we really appreciate and value your time and work. We love you, really.

Gemfile

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+source 'http://rubygems.org'
+
+gemspec
+
+case version = ENV['MONGOID_VERSION'] || '~> 5.0'
+when /5/
+  gem 'mongoid', '~> 5.0'
+when /4/
+  gem 'mongoid', '~> 4.0'
+when /3/
+  gem 'mongoid', '~> 3.1'
+else
+  gem 'mongoid', version
+end
+
+group :test do
+  gem 'rspec'
+end
+
+group :development do
+  gem 'rake'
+  gem 'rubocop', '0.33.0'
+end

LICENSE.md

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+MIT License
+
+Copyright (c) 2015 Daniel Doubrovkine, Artsy and Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+Mongoid::Compatibility
+=======================
+
+[![Gem Version](http://img.shields.io/gem/v/mongoid-compatibility.svg)](http://badge.fury.io/rb/mongoid-compatibility)
+[![Build Status](http://img.shields.io/travis/dblock/mongoid-compatibility.svg)](https://travis-ci.org/dblock/mongoid-compatibility)
+[![Dependency Status](https://gemnasium.com/dblock/mongoid-compatibility.svg)](https://gemnasium.com/dblock/mongoid-compatibility)
+[![Code Climate](https://codeclimate.com/github/dblock/mongoid-compatibility.svg)](https://codeclimate.com/github/dblock/mongoid-compatibility)
+
+Compatibility helpers for Mongoid 3, 4 and 5.
+
+### Install
+
+Add `mongoid-compatibility` to your Gemfile.
+
+```
+gem 'mongoid-compatibility'
+```
+
+### Use
+
+```
+Mongoid::Compatibility.mongoid3? # => is this Mongoid 3.x?
+Mongoid::Compatibility.mongoid4? # => is this Mongoid 4.x?
+Mongoid::Compatibility.mongoid5? # => is this Mongoid 5.x?
+```
+
+### Contribute
+
+See [CONTRIBUTING](CONTRIBUTING.md).
+
+### Copyright and License
+
+Copyright Daniel Doubrovkine and Contributors, Artsy Inc., 2015
+
+[MIT License](LICENSE.md)

Rakefile

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+require 'rubygems'
+require 'bundler/gem_tasks'
+
+Bundler.setup :default, :development
+
+require 'rspec/core'
+require 'rspec/core/rake_task'
+
+RSpec::Core::RakeTask.new(:spec) do |spec|
+  spec.pattern = FileList['spec/**/*_spec.rb']
+end
+
+require 'rubocop/rake_task'
+RuboCop::RakeTask.new(:rubocop)
+
+task default: [:rubocop, :spec]

lib/mongoid-compatibility.rb

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+require 'mongoid'
+require 'active_support'
+
+require 'mongoid-compatibility/self'
+require 'mongoid-compatibility/version'

lib/mongoid-compatibility/self.rb

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+module Mongoid
+  module Compatibility
+    VERSION = '0.1.0'
+  end
+end

lib/mongoid-compatibility/version.rb

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+module Mongoid
+  module Compatibility
+    module Version
+      def self.mongoid3?
+        Mongoid::VERSION =~ /^3\./
+      end
+
+      def self.mongoid4?
+        Mongoid::VERSION =~ /^4\./
+      end
+
+      def self.mongoid5?
+        Mongoid::VERSION =~ /^5\./
+      end
+    end
+  end
+end

lib/mongoid_compatibility.rb

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+require 'mongoid-compatibility'

mongoid-compatibility.gemspec

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+$LOAD_PATH.push File.expand_path('../lib', __FILE__)
+require 'mongoid-compatibility/self'
+
+Gem::Specification.new do |s|
+  s.name = 'mongoid-compatibility'
+  s.version = Mongoid::Compatibility::VERSION
+  s.authors = ['Daniel Doubrovkine']
+  s.email = 'dblock@dblock.org'
+  s.platform = Gem::Platform::RUBY
+  s.required_rubygems_version = '>= 1.3.6'
+  s.files = `git ls-files`.split("\n")
+  s.require_paths = ['lib']
+  s.homepage = 'http://github.com/dblock/mongoid-compatibility'
+  s.licenses = ['MIT']
+  s.summary = 'Compatibility helpers for Mongoid.'
+  s.add_dependency 'mongoid', '>= 3.0.0'
+  s.add_dependency 'activesupport'
+end

spec/config/mongoid3.yml

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+test:
+  sessions:
+    default:
+      database: mongoid-compatibility
+      hosts:
+        - localhost:27017
+      options:
+        raise_not_found_error: false
+        safe: true

spec/config/mongoid4.yml

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+test:
+  sessions:
+    default:
+      database: mongoid-compatibility
+      hosts:
+        - localhost:27017
+  options:
+    raise_not_found_error: false

spec/config/mongoid5.yml

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+test:
+  clients:
+    default:
+      database: mongoid-compatibility
+      hosts:
+        - localhost:27017
+  options:
+    raise_not_found_error: false

spec/mongoid-compatibility/self_spec.rb

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+require 'spec_helper'
+
+describe Mongoid::Compatibility do
+  it 'has a version' do
+    expect(Mongoid::Compatibility::VERSION).not_to be_nil
+  end
+end

spec/spec_helper.rb

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+$LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
+
+require 'rubygems'
+require 'rspec'
+require 'mongoid-compatibility'
+
+require 'support/mongoid'
+
+RSpec.configure(&:raise_errors_for_deprecations!)

spec/support/mongoid.rb

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+ENV['MONGOID_ENV'] = 'test'
+
+if Mongoid::Compatibility::Version.mongoid3?
+  Mongoid.load! 'spec/config/mongoid3.yml'
+elsif Mongoid::Compatibility::Version.mongoid4?
+  Mongoid.load! 'spec/config/mongoid4.yml'
+elsif Mongoid::Compatibility::Version.mongoid5?
+  Mongoid.load! 'spec/config/mongoid5.yml'
+else
+  fail "unsupported Mongoid version #{Mongoid::VERSION}"
+end
+
+RSpec.configure do |config|
+  config.before do
+    Mongoid.purge!
+  end
+  config.after(:all) do
+    if Mongoid::Compatibility::Version.mongoid3? || Mongoid::Compatibility::Version.mongoid4?
+      Mongoid.default_session.drop
+    else
+      Mongoid::Clients.default.database.drop
+    end
+  end
+end